- too many different discount coupons (20..30..50%)
- in a very short time frame (2 weeks iirc)
So early adopters will be disappointed to see a much larger discount only a couple of days after purchase.
Also 30-50% discounts are probably not a good sign in the early days of a new release because you undervalue your product when it's still "fresh". If liquidity is the reason for this strategy, you may want to offer some recurring payment plans like 9$/month or something.